Enhancing pyrolysis efficiency of oil sludge with coconut shell insights into hydrocarbon recovery and heavy metal stabilization.

ABSTRACT: This study investigates the effect of coconut shell (CS) addition on the pyrolysis behavior of oil sludge (OS) through co-pyrolysis experiments using bottom sludge from an oil refinery in Sichuan Province, China. Changes in pyrolysis-derived oil composition, residue elemental characteristics, and heavy metal stabilization were analyzed. Thermogravimetric analysis and kinetic modeling were performed to elucidate reaction mechanisms. The results indicate that CS exerts a pronounced synergistic effect on OS pyrolysis. Specifically: (1) The yield of light oil fractions increased significantly. The C18 hydrocarbon content in the recovered oil decreased, promoting macromolecular decomposition during OS pyrolysis. (2) The concentrations of hydrogen (·H) and hydroxyl radicals (·OH) increased, enha

SUBMITTER: Wang MR 

PROVIDER: S-EPMC12644459 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature